Tooth harrow



(No Model.) 2 Sheets-Sheet 1.

M.J.TODD.

SPRING TOOTH HARROW.

No; 513,372. Patented Jan. 23,1894.

mumuumm-m minimum-TF7? U NrrEnfS'rATE RQU PAT NT OFFICE.

1. Tee .OF' BUFFALO, NEW YORK,'ASSIGNOR "Torres PITTS AQRIQU LTURAL- WORKS, F SAME PLACE.

SPRING-TOOTH RROW.

' srncrn rcn'rron rel-ma part of Letters Patent No. 513,372, dated January 23,1894.

I Application filed May 8,1

, 'To all whom it may concern} Be it known that I, MARQUIS J. TODD, of,

I Bufialo, inthe county of Erie and State of New York, have invented certain new and useful Improvements in Spring-Tooth Harrows; and I do hereby declare the following to be a full, clear, and exact description of the inrow having vention, such as will enable others skilled .in the art to which it appertains to make and use the same.

This invention relates to certain new and useful-improvements in harrows, having reference to the class employing spring teeth.

The object ot the invention is to provide a harrow of this class with improved simple and 'efficient means whereby the harrow teeth can be re .dily and easily adjusted as to pitch, and

a great saving is efiected in the cost of iconstruction and material, employed.

The invention consists, broadly, of a barits teeth loosely or pivotally secured at their inner ends, and means for adjusting said teeth attached thereto at a point between the secured and free ends thereof.

The invention further consists of a harrow having its teeth loosely or pivotally secured at their inner ends, a series of straps for simultaneously adjusting all of said teeth, and a series of clips extending from saidstraps and engaging and binding said teeth at points intermediate of their secured and free ends.

' The' invention also consists of a new and improved form of clip for connecting the se- 'ries of straps to the teeth, and also of a pivot bearing or connection for the inner end of the teeth, said bearing having reduced points of contact.

rovements. Fig. 2 is a vertical longitudinal I sectional view taken through one of the teeth,

its clip and holder.

'zontalsectional'view of the v 5 and 6 are simila'r'yiews of slightl modlfied I I I wjengage corresponding teeth e on the inner v Fig; 3 is a-view of said clip witli'aportion at a tooth. Fig.4isahoritootlrholder. Figs.

forms thereof;

substantially as hereinafter fully ass. serene. 473,461. ma tis.

Referring to the drawings, A designates the barrow-frame confiiosed of zig-zag barsja. having parallel portions held in fixed relation by 5 nutted bolts a.

B designates the barrow .teeth which are looselysecured at theirinner ends between the adjacent portions of bars a, by'tooth holders v C ,whil'e at points intermediate of their secured 56g and free ends said teeth are connected by clips D to a series of connecting straps E, all of which latter are under the control of a single operating lever F. I v I The tooth holder G preferably comprises a: yoke 12 having parallel-sides b and a curved connection b said sides I) having upper and lower flanges 5 between whichthebarsaoare .designed to fit.

the belt a is passed. A pivot bolt 17 having through, openings ti alsoformed in the sides of the yoke, said ends being held in contact. with the inner sides of the parallel portions of bars a and on this bolt the harrow toothsecures its pivotal bearing, the endof. said tooth being coiled around the same. 'This bolt is preferably composed of two parts or sections 19' having flanges 1) between which the coiled end of the t'ooth tits,- said flanges fully drawn tog ther.

Through holes in the sides B' 7o outer pointed or cone-shaped ends 6 is passed r 3 binding against said end. when the parts are In lieu of making the pivot-bolt in two parts or sections, the tinuous piece as shown in Fig. 5, and the coiled end of tooth will fit between flanges b. extending inwardly from the sides of the yoke. Or, as shown in Fig. 6, cone shaped lugs b I may be projected inwardly from the sides ofthe yoke, and-cup-shape bushings b placed in the coiled end of the tooth to'receive said lugs and form the pivot bearings for the tooth. I The clips D comprise a loopda-nd a thread-' ed rod or extension d on which fits a collar d having a central opening and hub 61?, the latter being extended through a loose fitting opening in the connecting strap E; Anutd on extension d will hold the clip and the clamping collar to their positions. The outer end of the loop dis widened or elongated to form an extended bearing for theedge of the same may be made-in one conas a series of teeth ewith which are designed face of clamping collar d said teeth being in engagement with those of the tooth between or indentations 6 into any one of which is designed to project a liig e extending inwardly from one side of the loop. It will be seen that eachjtooth is capable of individual adjustment and that the clip can be firmly attached thereto at any desired point. The

series of connecting straps are under the direct control of alever F, which is fulcrumed on the bolt a of the rearmost-tooth. By operating this lever all of the teet h of one section of the harrow will be simultaneously operated.

From what has been said it will be seen that l have provided simple and inexpensive means for eifectingthe simultaneous adj ustment of all the barrow teeth; that the latter are loosely pivoted at their inner ends and connected by the clips to the series of straps at points intermediate of their lengths, whereby the strain on the teeth is removed from the inner holders thereof, and sufficient ma terial is left between the clips and the free ends of the teeth td'provide the latter with all requisite elasticity.

I claim as my invention 1. A harrow, spring teeth therefor loosely or pivotally secured at their inner ends, a se ries of connecting straps for operating said teeth, and adjustable connections. between said straps and'said teeth at points between the secured and free ends of the latter, sub-' stantially as set forth.

2. A harrow, spring teeth therefor loosely or pivotally securedat their inner ends, a series of connecting straps for simultaneously operating all of said teethya lever to which said straps are connected, and adjustable connections between said straps and said teeth at points between the secured and free ends of the latter, substantially as set forth.

3. A harrow, spring teeth therefor loosely or pivotally secured at their inner ends, aseries of connecting straps, and adjustable clips engaging said teeth at points between their secured and free ends and carried by said straps, substantially as set forth.

4. The frame having adjacent portions, the yokes, the spring teeth, and pointed orireduced bearings for the latter between said adjacent portions, as set forth. 7

5. In a harrow, the frame having adjacent portions, the spring teeth havinginner coiled ends, and the pivot-bolts therefor having pointed or reduced ends in contact with'said adjacent portions, said bolts being encircled bysaid coiled-ends of the teeth, substantially as set forth.

6. In a barrow, the frame having adjacent portions, the spring teeth, the pivot bolts therefor having their ends in contact with said adjacent portions, and the yokes supportling said pivot bolts, substantially as set fort 7. In a harrow, the frame having adjacent portions, thespring teeth, the pivot bolts therefor having their ends in contact with said'adjacent portions, and the yoke located between said adjacent portions and having openings in their sides to accommodate said pivot bolts, substantially as set forth.

8. In a harrow, the frame having adjacent portions, bolts between said portions, the

yokes having openings for saidbolts and engaging said adjacent portions, teeth, and pointed or reduced bearings for the inner ends of the latter, substantially as set forth.

9. In a harrow, the frame having adjacent portions, bolts between said portions, the yokes having openings in their sides for said bolts, the pivot bolts supported by said yokes and having pointed or reduced ends in contact with said adjacent portions, and" the the spring spring teeth having their inher ends encir-" cling said pivot bolts, forth.

10. In a harrow, the frame, the spring teeth loosely secured thereto at their inner ends,

substantially as set;

the clips, the connecting straps carryings'aid' clips, and the-clamping collars on said clips for binding said teeth, stantially as set forth.

at their edges sub- 11. In a harrow, the frame, the spring teeth loosely secured thereto at their inner ends,

the series of connecting straps for adjusting said teeth, and the looped clips carried by said straps and having each-abinding collar and nut for holding said clips to said teeth, at points between the ends .stantially asset forth. I H i 12. The frame, thepivjoted teeth havin toothed edges, the clipsengaging said" teeth of the latter, subhaving toothed clamping collars engaging said toothed edges, and the connecting straps carrying said clips, substantially as set forth.

13. The frame, the pivoted teeth having re ce'sses or indentations therein, the clips having loops and an inner lug to engage said recesses orindentation, and the straps carrying said clips, substantially as set forth.

14. The frame, the pivoted teeth having toothed edges and recesses or indentations, the'clips having loops and an inner lug, the clamping collar having teeth, the connecting straps, and the nuts on said clips for binding said collars against said toothed edges, substantially as set forth.

15. The frame, toothed edges, the series of connecting straps for operating said teeth'having holes therein, the clips havingloops for said teeth and inner threaded ends, the clamping collars having hubs fitting the holes in having teeth for engaging said toothed edges,

and the nuts on said threaded ends, substantmfiiv as set forth.

the pivoted teeth having said straps and alsov 16. The herein-described improved harrow, clamping collars, and the nuts for binding the comprising the frame having adjacent porlatter against said teeth, substantially as set tions, the bolts therefor, the yokes located forth. 1 between said adjacent portions and having In testimony whereof I have signed this 15 5 ears-or flanges overlapping the same, the specifi'cationin the presence of two subscribpivot bolts supported by said yokes having ing Witnesses. reduced ends in contact with'said adjacent 1 I i T portions, the spring teeth encircling said pivot NIARQI' Is I TODD bolts, the series of connecting straps, the op- Witnesses: I It: erating lever therefor, the clips carried by J. NOTA MCGILL,

said straps having loops for said teeth, the WM. S. IIoDGEs. 

